Text to image
Elo · text-to-image arena
Flux pro 1.1 overview
Flux pro 1.1 by Black Forest Labs
Discover FLUX 1.1 [Pro] API, an advanced text-to-image model offering fast generation and high-quality outputs tailored for developers' needs.
Flux pro 1.1 specs
- Model ID
blackforestlabs/flux-pro-1.1- Developer
- Black Forest Labs
- Input
- Text
- Output
- Text, Image
- Endpoint
POST https://api.aimlapi.com/v1/images/generations
Basic Information
- Developer/Creator: Black Forest Labs
- Model Type: Text-to-Image Generation Model
Overview
FLUX1.1 [pro] is a new image generation model with inference speed increased sixfold compared to the previous FLUX.1 [pro]. It also features enhanced generation quality and greater accuracy in following prompts.
Key Features
- Speed and Efficiency: Generates images six times faster than FLUX 1.0, with reduced latency that allows for more efficient workflows.
- High Image Quality: Capable of producing images up to 2K resolution while maintaining fidelity to the input prompt.
- Prompt Adherence: Improved algorithms ensure that the model accurately interprets and executes complex user instructions.
- Diversity of Outputs: The model can generate a wide variety of images from the same input, enhancing creative possibilities.
- API Accessibility: Available through the BFL API, allowing developers to integrate it seamlessly into applications.
Intended Use
- Marketing and advertising for quick asset creation.
- Product design for detailed visual prototypes.
- Entertainment industry for character design and concept art.
- Architecture and interior design for enhanced visual presentations.
- Fashion design for generating patterns and textures.
Language Support
Primarily supports English but can handle prompts in multiple languages, broadening its usability.
Architecture
FLUX 1.1 [Pro] employs a hybrid architecture that combines multimodal and parallel diffusion transformer blocks, scaled to 12 billion parameters.
Key architectural innovations include:
- Flow Matching Techniques: This method enhances training efficiency by treating diffusion as a special case, allowing for faster convergence during training.
- Rotary Positional Embeddings: These embeddings improve the model's ability to understand spatial relationships in generated images.
- Parallel Attention Layers: This feature optimizes processing speed and hardware efficiency, making it suitable for real-time applications.
Use cases
- Rapid Asset Creation: Generate high-quality concept art for games and film
- Marketing & E-commerce: Fast production of polished product imagery
- Creative Design: Diverse styles with strong prompt adherence
- High-Resolution Output: Ultra mode for billboards or large-format use
- Candid-style Photos: Raw mode for realistic human imaging
Flux pro 1.1 benchmarks by 
Artificial Analysis
Human-preference results for Flux pro 1.1 in text to image, next to models available on AI/ML API. Data retrieved Nov 3, 2026.
AI/ML API price
USD per generation
Models on AI/ML API
Arena results for models you can call with the same API key.
Text to image
Blind pairwise human votes on images generated from text prompts. Flux pro 1.1 ranks #82 of 98.
Flux pro 1.1 API pricing
| Usage | Price | Unit |
|---|---|---|
| Image generation | $0.04 | per generation |
The final price depends on request parameters such as resolution or duration.
Prices from the AI/ML API price list, checked on Nov 4, 2026.
Flux pro 1.1 vs other image models: prices
AI/ML API rates for 5 models, per generation.
| Model | Per generation |
|---|---|
 Flux pro 1.1 | $0.04 |
| FLUX.1 Dev | $0.025 |
| Flux.1 Kontext | $0.04 |
| Flux Kontext Pro | $0.04 |
 Nano Banana Edit | $0.04 |
How to use the Flux pro 1.1 API
View docs
Build with your agent
Give your agent the model details, code and documentation.
Paste it into your coding agent to build the integration.
1Get your API key
Create API keyexport AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"2Make your first request
curl 'https://api.aimlapi.com/v1/images/generations' \
-H "Authorization: Bearer $AIMLAPI_KEY" \
-H 'Content-Type: application/json' \
-d '{
"model": "blackforestlabs/flux-pro-1.1",
"prompt": "A ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}'import os
import requests
headers = {
"Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
"Content-Type": "application/json",
}
payload = {
"model": "blackforestlabs/flux-pro-1.1",
"prompt": "A ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}
response = requests.post("https://api.aimlapi.com/v1/images/generations", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())const response = await fetch("https://api.aimlapi.com/v1/images/generations", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
"model": "blackforestlabs/flux-pro-1.1",
"prompt": "A ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}),
});
if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());Models similar to Flux pro 1.1
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Flux pro 1.1 FAQ
What inputs and outputs does Flux pro 1.1 support?
Flux pro 1.1 takes image, text as input and returns image.
When was Flux pro 1.1 released?
Flux pro 1.1 became available on June 12, 2026.
How much does Flux pro 1.1 cost?
Flux pro 1.1 costs $0.04 per generation on AI/ML API, billed as you go with no subscription.
How is Flux pro 1.1 billed?
Flux pro 1.1 is billed per generation, a fixed charge per output rather than by prompt length.
Can Flux pro 1.1 take an existing image as input?
Yes, Flux pro 1.1 accepts image input as well as a text prompt.
Who created Flux pro 1.1?
Flux pro 1.1 was built by Black Forest Labs.
How do I call Flux pro 1.1 on AI/ML API?
Send a request to https://api.aimlapi.com/v1/images/generations with blackforestlabs/flux-pro-1.1 as the model id.
Is Flux pro 1.1 available through a single API key?
Yes. Flux pro 1.1 is served through AI/ML API, so the same key and endpoint format used for other models applies.
What is the Flux pro 1.1 model ID?
Use blackforestlabs/flux-pro-1.1 as the model parameter. Requests go to https://api.aimlapi.com/v1/images/generations with your AI/ML API key.